EP 2669722 A4 20140219 - WAVEGUIDE-TYPE POLARIZATION BEAM SPLITTER
Title (en)
WAVEGUIDE-TYPE POLARIZATION BEAM SPLITTER
Title (de)
POLARISATIONSSTRAHLENTEILER MIT WELLENLEITERN
Title (fr)
SÉPARATEUR DE FAISCEAU DE POLARISATION DE TYPE GUIDE D'ONDES
Publication
Application
Priority
- JP 2011014545 A 20110126
- JP 2012000474 W 20120125
Abstract (en)
[origin: EP2669722A1] Provided is a waveguide-type polarization beam splitter in which deterioration of a polarization extinction ratio due to temperature change and wavelength change is suppressed. The waveguide-type polarization beam splitter includes: an input optical waveguides (11); a first optical coupler (12) coupled to the input optical waveguides (11); a pair of optical waveguide arms (13a, 13b) coupled to outputs of the first optical coupler; and a second optical coupler (18) coupled to the pair of optical waveguide arms (13a, 13b). A groove (15) is formed to extend across the pair of optical waveguide arms (13a, 13b) and two quarter wave plates (16a, 16b) are provided in the groove (15) to extend respectively across the arms (13a, 13b). Polarization axes of the quarter wave plates (16a, 16b) are orthogonal to each other. The first optical coupler (12) which gives a phase difference of 0° or 180° between coupled or split light beams and the second optical coupler (18) which gives a phase difference of 90° or -90° between coupled or split light beams are used in combination.
IPC 8 full level
G02B 6/12 (2006.01); G02B 6/126 (2006.01); G02B 6/27 (2006.01); G02B 6/28 (2006.01)
CPC (source: EP US)
G02B 6/126 (2013.01 - EP US); G02B 6/2793 (2013.01 - EP US); G02B 6/2813 (2013.01 - EP US); G02B 2006/12116 (2013.01 - EP US); G02B 2006/1215 (2013.01 - EP US)
Citation (search report)
- [A] WO 2010140363 A1 20101209 - NIPPON TELEGRAPH & TELEPHONE [JP], et al
- [A] EP 1302793 A2 20030416 - UNIV NANYANG [SG]
- See references of WO 2012102039A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 2669722 A1 20131204; EP 2669722 A4 20140219; EP 2669722 B1 20150114; CA 2825540 A1 20120802; CA 2825540 C 20161213; CN 103339541 A 20131002; CN 103339541 B 20150826; JP 5567696 B2 20140806; JP WO2012102039 A1 20140630; US 2013301976 A1 20131114; US 9235003 B2 20160112; WO 2012102039 A1 20120802
DOCDB simple family (application)
EP 12739739 A 20120125; CA 2825540 A 20120125; CN 201280006559 A 20120125; JP 2012000474 W 20120125; JP 2012554690 A 20120125; US 201213981285 A 20120125